Adjustable jaw internal wrench with threaded handle



A. R. JOY

Jan. 6, 1953 ADJUSTABLE JAW INTERNAL WRENCH WITH THREADED HANDLE FiledMay 5, 1950 INVENTOR ATT RNEY Patented Jan. 6, 1 953 UNITED STATESPATENT OFFICE l V 2,624,222; I 4 v ADJUSTABLE JAW INTERNAL WRENCH WITHTHREADED I Alfred -B. J oy-;.,W.est lilartford'i'v Cbnn'z, assignor. to

R. M. Starbuck &

Sons, Inc.,

Hartford, Conn.,

a corporation of Connecticut Application May 5, 1950, Serial No. 160,284

1 Claim.

This invention relates to wrenches and more particularly to an expandingwrench for engaging internal cylindrical surfaces of members to betightened or loosened.

An object of the invention is to provide an improved form of wrench forengaging internal surfaces with an exceptionally strong bite or grip andto provide a form of wrench that may be used in unusual and awkwardlocations.

Another object of the invention is to provide two telescopic members,each member having one of the work engaging jaws at one end and therebeing a handle member threaded to one of the members and bearing againstthe end face of the other member when the jaws are being moved to theirwork clamping positions.

And finally to provide means for retaining the jaw members in alignmentwith each other.

With the above and other objects in view the invention may include thefeatures of construction and operation set forth in the followingspecification and illustration in the accompanying drawings.

In the accompanying drawing annexed hereto and forming a part of thisspecification, I have shown the invention embodied in a so-calledplumbers spud-wrench, but it will be understood that the invention canbe otherwise embodied and that thedrawing is not to be construed asdefining or limiting the scope of the invention, the claim appended tothis specification being relied upon for that purpose.

In the drawing:

Fig. lis a side elevation of a complete wrench made in accordance withthe present invention with the jaws in one of their adjusted positions;

Fig. 2 is a longitudinal sectional view of the wrench shown in Fig. 1;

Fig. 3 is a transverse sectional view taken on the plane of line 3-3 inFig. 1, and

Fig. 4 is a view similar to Fig. 3 taken on the plane of line 4-4 inFig. 1.

In the above mentioned drawing, there has been shown but one embodimentof the invention which is now deemed preferable but it is to beunderstood that changes and modifications may be made within the scopeof the appended claim without departing from the spirit of theinvention.

Briefly, and in its preferred aspect, the invention may include thefollowing principal parts: First, an outer jaw member secured rigidly toa sleeve or tube at one end thereof; second, another jaw member securedrigidly to one end of it is an object of the invention slot 22 extendinga threaded member slidably movable within the sleeve, and third a handlemember engaging the threads of the threaded member and bearing againstan end face of the sleeve.

Referring more in detail to the figures of the drawing there is shown atill a jaw member attached by means of a transverse pin l2 or by anyother convenient means to a sleeve 4. The opposite jaw 16 is attached asby means of a short transverse pin It to one end of a threaded member20. The pin I8 passes through an elongated longitudinally of the sleeve[4 during adjustment of slot 22 in the sleeve l4 the jaw members aremaintained always in alignment. Also by means of the pin l8 the jawmember I6 is rigidly attached to the threaded member 20 and may slideover the outer surface of the sleeve.

Threaded over the threaded end of the member 20 is a handle member 24.As shown the handle member is longitudinally fluted on its outsidesurface and provided with a central axial opening extending therethroughfor the passage of member 20. The forward end only of this opening isthreaded to engage the threads on member 20. The forward end of thehandle member 24 in operation bears against the end face of the sleevel4 and by rotation of the handle member 24 the jaws l0 and Hi can beforced apart to firmly engage against the inner surface of a member tobe threaded on or taken from a companion member.

In order to disassemble the parts forming the wrench the jaw l6 may bebrought into a position to align its hole for the transverse pin 18 withthe hole 28 in the sleeve l2 so that pin l8 Pin l2 for the jaw l0 mayalso be driven out so that with the handle member 24 unthreaded from themember 20 all parts of the wrench are separated and may be reassembledvery simply after replacing worn or damaged parts.

The cross sections of the jaws l0 and I6 are rectangular so that theircorners or lateral edges will sharply engage the surface of the memberto be turned by the wrench. The wrench is made rigid throughout itslength by the sleeve l4 and. threaded member 20 being tightly engaged bythe handle member 24.

I claim as my invention:

An internal wrench having a jaw member provided with gripping edges onits outer surface and rigidly attached to one end of a sleeve, saidsleeve having a slot extending longitudinally throughout theintermediate portions thereof, a

the jaws. By means of thissecond Jaw member slidable over said sleeveand REFERENCES CITED having gripping edges cooperating with the grip Thefollowing references are of record in the ping edges on said firstmentioned jaw member, fil f this patent; a threaded member slidablewithin said sleeve,

the inner end of said threaded member being at- 5 UNITED STATES PATENTStached to said second jaw member by means ex- Number Name Date tendingthrough said slot, and a rotatable handl 1,301 Hewet Aug 1839 memberhaving screw threads engaging said 378,584 Gavin et a1 Feb 28 1888threaded member and being forced against the 850 900 Boyton Apt-v23,1907 end surface of said sleeve when said second jaw, 10 LlzljzzgCappabianco Dec 15 1914 member is moved from said first jaw member intoclamping engagement with an internal surface FOREIGN PATENTS of a workpiece. Number Country Date ALFRED:R. JOY. 13,381 France May 4, 1355

